A cnt file extension is related to the Help Contents files used by Microsoft Windows Help.

There are 4 other file types using
the CNT file extension!

empty icon.cnt - Rational Rose 98 contents tab

empty icon.cnt - ENVI PPI count data

empty icon.cnt - Hidden & Dangerous game data

cnt icon.cnt - 602Pro PC Suite macro

CNT file extension - Help Contents data

What is cnt file? How to open cnt files?

File type specification:

Document file type icon Document file type

Email attachment blocked file type icon Email attachment blocked file type

cnt file icon: cnt filetype icon

File extension cnt is related to Help Contents files.

The cnt files are help files used by Windows and contain topics relevant to a certain Help document. They may have been created by Microsoft Help Workshop, a program for developing help documentation.

Also There is a known security issue with cnt files that allows them to be exploited, causing a stack-based buffer overflow, which can be used to run malicious codes Its is imperative that you do not open unknown cnt files.

The default software associated to open cnt file:

Microsoft Windows Help icon

Microsoft Corporation logoMicrosoft Windows Help  Microsoft Windows software

Company or developer:
Microsoft Corporation

Microsoft Windows Help is used to create help files for Microsoft Windows operating system and other Microsoft applications. Windows Help SDKs are different for every version of Windows it can be called Windows Help, Help and Support Center, Assistance Platform 1.0 Client - Windows Vista Help SDK, Microsoft Windows: HTML Help 1.4 etc.

Microsoft HTML Help Workshop icon

Microsoft Corporation logoMicrosoft HTML Help Workshop  Microsoft Windows software

Company or developer:
Microsoft Corporation

Microsoft HTML Help Workshop is help documents authoring application.

Microsoft Windows icon

Microsoft Corporation logoMicrosoft Windows  Microsoft Windows software

Company or developer:
Microsoft Corporation

A family of operating systems developed by the Microsoft Corp. The first Windows was released in 1985 as a GUI add-on to MS-DOS. MS-DOS based Windows versions were developed to 2000, when was released the last version called Windows ME. Windows based on NT core started in 1993. Windows NT family are developed to these days, the latest version is called Microsoft Windows 11.

Help how to open:

Use WinHelp or RoboHelp to work with the *.cnt files.

How to convert:

Adobe RoboHelp is may be able to export *.cnt files to other file formats.

Find conversions from cnt file:

cnt to hpj

Find converter to cnt file type:

glo to cnt

List of software applications associated to the .cnt file extension

Recommended software programs are sorted by OS platform (Windows, macOS, Linux, iOS, Android etc.)
and possible program actions that can be done with the file: like open cnt file, edit cnt file, convert cnt file, view cnt file, play cnt file etc. (if exist software for corresponding action in File-Extensions.org's database).

Click on the tab below to simply browse between the application actions, to quickly get a list of recommended software, which is able to perform the specified software action, such as opening, editing or converting cnt files.

Software that open cnt file - Help Contents data

Programs supporting the exension cnt on the main platforms Windows, Mac, Linux or mobile. Click on the link to get more information about listed programs for open cnt file action.

Microsoft Windows:

Main software associated with cnt file by default:
Microsoft Windows Help small icon Microsoft Windows Help
Microsoft HTML Help Workshop small icon Microsoft HTML Help Workshop
Other suggested software:
Adobe RoboHelp small icon Adobe RoboHelp

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